Testing metadata forwarders

[swang392]

What does this PR do?

A brief description of the change being made with this pull request.

Motivation

What inspired you to submit this pull request?

Additional Notes

Anything else we should know when reviewing?

Minimum Agent Versions

Are there minimum versions of the Datadog Agent and/or Cluster Agent required?

• Agent: vX.Y.Z
• Cluster Agent: vX.Y.Z

Describe your test plan

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Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 38.64%. Comparing base (290e1e2) to head (6baf530).
⚠️ Report is 9 commits behind head on swang392/add-crd-forwarder.

Additional details and impacted files

@@                      Coverage Diff                       @@
##           swang392/add-crd-forwarder    #2322      +/-   ##
==============================================================
+ Coverage                       37.69%   38.64%   +0.94%     
==============================================================
  Files                             259      259              
  Lines                           21961    22714     +753     
==============================================================
+ Hits                             8278     8777     +499     
- Misses                          13044    13285     +241     
- Partials                          639      652      +13     

Flag	Coverage Δ
unittests	38.64% <ø> (+0.94%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
pkg/controller/utils/metadata/crd_metadata.go	33.81% <ø> (-0.32%)	⬇️
pkg/controller/utils/metadata/helm_metadata.go	26.42% <ø> (+0.02%)	⬆️
pkg/controller/utils/metadata/operator_metadata.go	11.40% <ø> (-0.78%)	⬇️

... and 44 files with indirect coverage changes

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